age restrictions are strict on cruises. The following applies for the cruise lines considered by you:

Carnival Cruise Lines:

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Guests under the age of 21 must be accompanied in the same stateroom by a parent or guardian 25 or older. The exceptions Carnival will make to this policy are:

Married minor couple - The booking must be documented that the couple is married. The couple must have proof of marriage at embarkation or they will be denied boarding without the benefit of a refund.

Domestic Partners/Same-*** Union minor couple - The booking must be documented that the couple are legal Domestic Partners/Same-*** Union. The couple must have legal proof of partnership/union at embarkation or they will be denied boarding without the benefit of a refund.

Royal Caribbean International:

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No guest under the age of twenty-one (21) will be reserved in a stateroom unless accompanied by an adult twenty-one (21) years of age, or older. This age limit will be waived for minor children sailing with their parents or guardians in adjacent staterooms or under-aged married couples (proof of marriage is required).

Celebrity Cruises:

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No guest under the age of 21 will be booked in a stateroom unless accompanied by an adult 21 years or older. This age limit will be waived for minor children sailing with their parents or guardians in adjacent staterooms.